I never really reply to threads but I glanced at your first page pics to see what seedbank your gg is from and seen you had a small seedling in a big pot...
I found out through my own experience to have a bunch of dif sized pots from small to larger.... The roots seek oxygen and accelerate growth dramatically when starting in small pots and increasing pot size over time..
If a small plant is in so much soil the roots cannot reach the side of the pot quick enough to breathe and takes much longer to grow....
Just my 2 cents
I don't post in these either, but the flip side of that is "transplant shock". I personally go with the final pot right out of the solo-cup, and I don't even let them get root-bound in the cup.
Keeping the soil fairly dry helps with the oxygen thing. It
will grow slower at first, but I think the payoff is that once the roots get there and she does take off, it doesn't slow down.
Overwatering early in a big pot can be an issue too, because you may soak areas where the roots aren't yet. But if you feed based on the size of the plant and not the pot, it works.